Maldives Lettuce Greenhouse HVAC Solution

Short Description:

Greenhouse can protect crops from adverse weather conditions allowing year-round production and have better protection control over pests and diseases, and still benefiting from the sun’s natural light. The ideal climate condition for lettuce cultivation should maintain constant temperature and humidity for 21℃ and 50~70%. Indoor temperature, humidity, carbon dioxide control and adequate irragation are the most essential factors for lettuce cultivation.


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Maldives Lettuce Greenhouse HVAC Solution Detail:

Project Location

Maldives

Product

Condensing unit, Vertical AHU,  Air-cooled water chiller, ERV

Application

Lettuce cultivation

Key requirement for lettuce cultivation HVAC:

Greenhouse can protect crops from adverse weather conditions allowing year-round production and have better protection control over pests and diseases, and still benefiting from the sun’s natural light. The ideal climate condition for lettuce cultivation should maintain constant temperature and humidity for 21℃ and 50~70%. Indoor temperature, humidity, carbon dioxide control and adequate irragation are the most essential factors for lettuce cultivation.

Local temperature & humidity: 28~30℃/70~77%

Indoor HVAC Design: 21℃/50~70%. Day time: constant temperature & humidity; Night time: constant temperature.

Project solution:

1. HVAC Design: Indoor temperature and humidity solution

1. Two pieces of condensing outdoor units(Cooling capacity:75KW*2)

2. One piece of vertical air handling unit (Cooling capacity:150KW, electric heating capacity:30KW)

3. One piece of PLC constant temperature and humidity controller

Sufficient ventilation is very important for optimal plant growth, especially in the case of high outside temperatures and solar radiation. Heat must constantly be removed from the greenhouse. Compare to natural ventilation, AHU with PLC control can precisely obtaining the required climate conditions; it can further reduce the temperature, especially under high ambient temperatures or high radiation levels. With high cooling capacity it can keep the greenhouse completely closed, even at maximum radiation levels. AHU can also provide an energy-efficient dehumidify solution to avoid the condensation during daytime and particularly few hours after sunset.

2. HVAC Design: Indoor CO2 control solution

1. One piece of energy recovery ventilator (3000m3/h, one time air change per hours)

2. One piece of CO2 sensor

CO2 enrichment is essential to increase quality of produce. In the absence of artificial supplies, greenhouses have to be ventilated during a large part of the day makes it uneconomical to maintain a high CO2 concentration. The concentration of CO2 within the greenhouse must be lower than outside in order to obtain inward flow. It implies a trade-off between ensuring inflow of CO2 and maintaining an adequate temperature within the greenhouse, particularly during sunny days.

The energy recovery ventilator with CO2 sensor provides an optimal CO2 enrichment solution. CO2 sensor real-time monitor indoor concentration level and precisely adjust extract and supply airflow to achieve CO2 enrichment.

3. Irrigation

We suggest to use one water chiller and thermal insulation water tank. Water chiller cooling capacity:20KW (with outlet chilled water of 20℃@ambient of 32℃)


Product detail pictures:

Maldives Lettuce Greenhouse HVAC Solution detail pictures


Related Product Guide:

Our enterprise since its inception, usually regards product top quality as business life, repeatedly enhance manufacturing technology, make improvements to product excellent and continuously strengthen enterprise total high quality administration, in strict accordance with all the national standard ISO 9001:2000 for Maldives Lettuce Greenhouse HVAC Solution , The product will supply to all over the world, such as: Armenia, Ukraine, Haiti, We've a good reputation for stable quality solutions, well received by customers at home and abroad. Our company would be guided by the idea of "Standing in Domestic Markets, Walking into International Markets". We sincerely hope that we could do business with customers both at home and abroad. We expect sincere cooperation and common development!
Good quality and fast delivery, it's very nice. Some products have a little bit problem, but the supplier replaced timely, overall, we are satisfied.
5 Stars By Cora from Iran - 2018.06.28 19:27
The factory workers have a good team spirit, so we received high quality products fast, in addition, the price is also appropriate, this is a very good and reliable Chinese manufacturers.
5 Stars By Diego from Colombia - 2017.08.28 16:02

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